repo-ng

I built and installed the latest ndn-cxx and repo-ng. I copied repo-ng.conf.sample to repo-ng.conf. When I run ndn-repo-ng it says:

Unrecognized 'registration-subset' option in 'tcp_bulk_insert' section in configuration file '/usr/local/etc/ndn/repo-ng.conf'

A weird thing is that there is no 'registration-subset' option in the 'tcp_bulk_insert' section, but there is in the 'data' section:
https://github.com/named-data/repo-ng/blob/190e4dcf319aa9bdd92f426ed6878619fafa1f97/repo-ng.conf.sample

data
{
  registration-subset 2
  prefix "ndn:/example/data/1"
  prefix "ndn:/example/data/2"
}

In any case, can't start repo-ng.